Spark-arrester.



n. L. NEEDHAM. v SPARK ARRESTER. APPLICATION FILED FEB. 25. 1915.

1,140,91 1 .Patented Maj l25, 1915.

H LNEEDHHM @www WJW THE NURRIS PETERS CO.. PHOTO-LITRO WASHINGTON. D. C

SPARK-ARRES TER.

Specication of Letters Patent.

Patented May 25, 1915.

Application led February 25, 1915. Serial No. 10,591.

T0 all @07mm t may concern: i

Be it known that I, IIoUGHToN L. NnED- HAM, a citizen of the United States, residing at Chicago, in the county of Cook and State` of Illinois, have invented new and useful Improvements in Spark-Arresters, of which the following is a specification.

This invention 4relates to improvements in spark arresters and more particularly to a spark arrester located within the smoke box of a locomotive.

It is the object of this invention to provide a spark arrester which may be readily applied to the front end of locomotives now in service without making any change in the locomotive structure with the exception vof removing the usual netting, and it is a further object of this invention to return the sparks and cinders arrested by this device to the iire box of the locomotive.

The advantages of this invention are 0bvious. The parts are readily applicable to the front of any locomotive now in service without any change in the usual locomotive structure, with the exception of the removal of the usual netting. The sparks, heavier gases, and particles of unburnt fuel are returned to the fire box, thereby greatly reducing the heavy smoke. usually expelled from the smoke stack.

Another advantage of this invention is that the operation of this spark arrester does not depend entirely upon the utilization of the exhaust steam from the cylinders While the engine is in motion, and will operate as well while the engine is stationary.

`While the preferred forms of this invention are illustrated upon the accompanying sheet of drawing yet it is to be understood i that minor detail changes may be made without departing from the scope thereof.

Figure l is a view in side elevation, with parts broken away, illustrating the application of this improved spark arrester to a locomotives front end. Fig. 2 isa view in front elevation of a locomotive with the front end closure removed, illustrating this invention. Fig. 3 is an enlarged detail view in longitudinal vertical section through the injector nozzles. y

The front end and stack, as illustrated in Fig. 1, are of the usual conventional form, the exhaust nozzle l from the steam chest for creating a draft and discharging the smoke from the stack while the engine is in motion is also of the usual conventional -ing leading to the spark chamber form, and the steam blower nozzle 2 cony nected with the boiler for creating a draft and expelling the smoke while the engine is stationary is also of the usual conventional form.

In carrying out this invention two laterally inclined perforated plates 3 are ar ranged and supported in the front end of the locomotive between the exhaust nozzle l and the removable front end closure. The lower edges of these inclined plates meet 1n a horizontal line in the center of the front end and extend substantially an equal dis tance above and below the horizontal center line thereof, the upper edges of each plate being curved downwardly and are spaced apart from the walls of the front end. The lower under edge of each perforation is preferably provided with a depending. lip, for purpose hereinafter described.

Spark receiving chambers 4f are secured to the walls of the front end on each side below the tops of the inclined perforated deiiecting plates 3, the width of each chamber being about the same as the distance between the top end of the plate and the side wall and arranged about an equal distance below said top end of the inclined plates. These chambers are preferably of the form illustrated with their sides tapering downward to an opening in the walls about on a line with the lower edges of the inclined plates. The top of each vchamber a is provided with a perforated deflecting or baflie plate extending inwardly and downwardly from the upper inner edge and each chamber is also provided with a second oppositely disposed downwardly inclined perforated baille 6.

Upon each side of the exterior of the engine casing is arranged a return pipe 7 connected at the forward end to the open- 4, said pipe extending rearwardly and downwardly entering the side of the fire box of the locomotive at or above the ire line near the back head.

An injector nozzle 8 is provided at the forward end of the return pipe in advance of its connection to the spark chamber having a connection 9 to the steam exhaust nozzle l whereby, while the locomotive is in motion, the pressure of the steam `from thev steam exhaust nozzle entering the injecter 8 at the'front end of the return pipe 7 will cause the cinders, particles of unburnt fuel, and heavier gases collected in the spark receiving chambers 4 on each side to be forced through the return pipe and discharged `in the fire box of the engine to be consumed. The pressure from the exhaust nozzle acting in its normal capacity will cause the smoke, cinders and heavier gases issuing from the boiler in the usual manner to impinge upon 'the inclined plates 4l, the lighter smoke pass- -create the draft, to prevent suction of gases from the fire box through the return pipe and spark chambers, a branch 10 from the boiler blower pipe is carried forward to an injector nozzle 11 entering within the exhaust steam injector 8 in the return pipe. A second branch 12 leads from the blower injector nozzle 11 on one side about the exterior of the front end, either above or below, to a similar blower injector nozzle arranged within the steam injector nozzle upon the return pipe on the other side. lt is therefore readily seen that while the engine is stationary and the steam blower nozzle 2 from the boiler creates the draft and expels the smoke through the stack in the usual manner, the blower injector upon the front end of the return pipe 7 will cause the cinders and heavier gases to be returned therethrough to the fire box in the same manner as if the engine was in motion.

What I claim is 1. A spark arrester for locomotives having a steam exhaust nozzle arranged below the locomotive smoke stack, two laterally inclined perforated defiecting plates arranged between the exhaust nozzle and front end closure meeting in a horizontal line below the center of the locomotive casing and having curved upper ends, spark receiving chambers arranged on the interior of each side of the front end below the upper extremities of each deflecting plate, alternately arranged inwardly projecting baflie plates in each spark receiving chamber, a returning pipe on the exterior of each side of the locomotive casing leading from each spark chamber to the re box, a steam injector on the forward end of each return pipe in the advance of its connection to the spark cham- Copies of this patent may be obtained for ve cents each, by addressngthe Washington, D. CJ

ing plates arranged between the exhaust nozzle and front end closure meeting in horizontal line below the center of the locomotive casing and having curved upper ends, spark receiving chambers arranged upon the interior of each side ofthe front end below the upper extremities of each defleeting plate, alternately arranged inwardly inclined perforated baffle plates in each chamber, a return pipe on each exterior side of the locomotive casing spark chamber to the fire box, a steam injector on the front end ofl each return vpipe in advance of its .connection to the spark chamber and a connection from the steam blower pipe to each steam injector. l Y

3. A spark arrester for locomotives having an exhaust steam nozzle and a steam blower nozzle, spark receiving chambers on the interior of each sideof the front end, inclined perforated deflecting plates terminating above said chambers, a return pipe from each chamber to the lire box, a steam injector in each end of the returnpipe connected to the exhaust steam nozzle and a` second steam injector within the first connected to the steam blower pipe.

L A spark arrester for locomotives having a steam exhaust nozzle arranged below the locomotive smoke stack and a steam blower nozzle arranged in proximity thereto, two laterally inclined perforated deflected plates arranged between the exhaust nozzle and the front end closure meeting in a horizontal line below the center of the locomotive casing .and having curved upper ends, spark receiving chamber arranged on the interior of each side of the front end below the upper extremity of each deflecting plate, a return pipe on the exterior of each side of the locomotive casing leading from each spark chamber to the lire box, a steam injector on the forward end of each return pipe in advance of its connection to the spark chamber, a connection from the steam exhaust nozzle to each steam injector, a second steam injector arranged within each of the first steam injectors and a connection between each second steam injector to the steam blower pipe.

HOUGHTON L. NEEDHAM.

Vitnesses:

LANGDON Moomi, JOHN R. WooDwonrH.

Commissioner .of Patents,

leading from each v 

